Check out Jethro Tull's "Bouree: Morgan Version," a previously unreleased song, from the expanded reissue of Stand Up. You can listen to our exclusive premiere of the track below.

The new set, called the "Elevated Edition," features two CDs of music and a DVD. The first disc features Steven Wilson’s new stereo mixes of the original 1969 album, paired with rare recordings like "Bouree." There are also four additional songs recorded at the BBC, as well as stereo single mixes of "Driving Song" and "Living in the Past."

The second disc in the Stand Up: Elevated Edition set finds Jethro Tull performing live in Sweden, just a few weeks after Martin Barre joined the band. Highlights from the evening's set list include two cuts from Stand Up, plus songs originally found on the band's debut album. Another Wilson remix, this time in surround sound, is included on the DVD along with concert footage from January 1969 and other goodies.

Stand Up marked an early turning point for Jethro Tull, as their second album introduced folk-rock influences into what had previously been a sturdy blues-based sound. It also marked the first studio collaboration with Barre, a guitarist who would become Tull leader Ian Anderson's longest-running bandmate.

In a recent interview, Anderson selected Stand Up as his favorite Tull album, “because that was my first album of first really original music. It has a special place in my heart.”

The album topped the U.K. charts, and earned gold-certification status in the U.S. You can buy Stand Up: Elevated Edition, which is out today, now.